Raspberry PI as a wireless bridge..

I'm using a RPi with an Edimax usb wireless controller to bridge the home wireless network into a switch with some kit connected that I would rather not cable up to. Once you've got the wireless set up (using the wpa_gui or any number of cli variants the rest is nice and easy – if you install bridge-utils ! For reference:

apt-get update
apt-get install bridge-utils

Then I just replaced my /etc/network/interfaces with something like this – I'm fixing the PI's address on the LAN so that I can get to it.